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Effect of Different Calcination Temperatures and Post Annealing on the Properties of Acetic Acid Based Sol-Gel (Na0.5K0.5)NbO3 (NKN) Thin Films

Wiegand, Sebastian and Flege, Stefan and Baake, Olaf and Ensinger, Wolfgang (2013):
Effect of Different Calcination Temperatures and Post Annealing on the Properties of Acetic Acid Based Sol-Gel (Na0.5K0.5)NbO3 (NKN) Thin Films.
In: Journal of Materials Science & Technology, Elsevier Science Publishing Company, ISSN 10050302, [Online-Edition: http://dx.doi.org/10.1016/j.jmst.2012.11.012],
[Article]

Abstract

(Na0.5K0.5)NbO3 (NKN) lead free thin films were synthesized by means of an acetic acid based sol-gel process on Pt/Ti/SiO2/Si substrates. Na-acetate, K-acetate and Nb-pentaethoxide were used as metal precursors and acetic acid as the solvent. The effect of different calcination temperatures on the properties of the NKN films was investigated by X-ray diffraction, scanning electron microscopy, leakage current and hysteresis measurements. Low calcination temperatures led to low currents at high electric fields whereas high calcination temperatures led to low currents at low electric fields. Based on these findings calcination at low temperature was combined with a post annealing treatment. Low leakage currents of 4×10−4 A/cm² at 150 kV/cm and 2Pr and 2Ec values of 28 μC/cm² and 150 kV/cm, respectively, could be obtained. All films were single phase NKN with random crystal orientations and no crack or pore formation was visible on the surface.

Item Type: Article
Erschienen: 2013
Creators: Wiegand, Sebastian and Flege, Stefan and Baake, Olaf and Ensinger, Wolfgang
Title: Effect of Different Calcination Temperatures and Post Annealing on the Properties of Acetic Acid Based Sol-Gel (Na0.5K0.5)NbO3 (NKN) Thin Films
Language: English
Abstract:

(Na0.5K0.5)NbO3 (NKN) lead free thin films were synthesized by means of an acetic acid based sol-gel process on Pt/Ti/SiO2/Si substrates. Na-acetate, K-acetate and Nb-pentaethoxide were used as metal precursors and acetic acid as the solvent. The effect of different calcination temperatures on the properties of the NKN films was investigated by X-ray diffraction, scanning electron microscopy, leakage current and hysteresis measurements. Low calcination temperatures led to low currents at high electric fields whereas high calcination temperatures led to low currents at low electric fields. Based on these findings calcination at low temperature was combined with a post annealing treatment. Low leakage currents of 4×10−4 A/cm² at 150 kV/cm and 2Pr and 2Ec values of 28 μC/cm² and 150 kV/cm, respectively, could be obtained. All films were single phase NKN with random crystal orientations and no crack or pore formation was visible on the surface.

Journal or Publication Title: Journal of Materials Science & Technology
Publisher: Elsevier Science Publishing Company
Uncontrolled Keywords: Sol-gel process, Na0.5K0.5)NbO3, Thin film, Perovskite, Lead-free, Piezo material
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Material Analytics
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 14 Jan 2013 11:55
Official URL: http://dx.doi.org/10.1016/j.jmst.2012.11.012
Identification Number: doi:10.1016/j.jmst.2012.11.012
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